Lock bolt



FIG. 1 is a front elevational view of a lock bolt, showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a cross-sectional view thereof, taken along line 7-7 of FIG. 1;

FIG. 8 is a cross-sectional view thereof, taken along line 8-8 of FIG. 1; and,

FIG. 9 is a perspective view thereof. 

CLAIM The ornamental design for a lock bolt, as shown and described. 